subways

n.

an electric railway operating below the surface of the ground (usually in a city)

"in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'"

同义词：metrotubeundergroundsubway system

an underground tunnel or passage enabling pedestrians to cross a road or railway

同义词：underpass

Passenger Flow in Subways
Searching for Black Holes in Subways
Earthquake design criteria for subways
Subways, Strikes, and Slowdowns: The Impacts of Public Transit on Traffic Congestion
Health and safety hazards associated with subways: a review.
Evaluating the Accessibility about Beijing′s Subways in 2008 Based on Spatial Syntax
Introducing public–private partnerships for metropolitan subways in China: what is the evidence?
Measurement of building foundation and ground-borne vibrations due to surface trains and subways
Numerical analysis of factors affecting the range of heat transfer in earth surrounding three subways
The Cult at the End of the World: The Terrifying Story of the Aum Doomsday Cult, from the Subways of Tokyo to the Nuclear Arsenals o...